Float finish machine

Abstract

A float finish machine includes a rotor with a disk supporting a set of trowel blades, accommodated in corresponding radial slots, that are angularly adjustable with respect to the rotor about axes that are substantially parallel to the floor. The machine includes an engine and a speed reducer having an output shaft with a sliding collar positioned thereon. An idle spacing element, having a hub that is ensheathed by a sleeve, and that is rotatably coupled with the shaft through the sliding collar, has a diameter greater than the disk and is positioned on the shaft to freely rotate about the axis of the shaft. The sleeve operates in conjunction with a device for setting the angular position of the trowel blades.

I claim: 
     
       1. A float finish machine for floating floors, comprising a rotor including a disk, disposed substantially parallel to the floor, the disk being provided with radial slots each accommodating a trowel blade, each trowel blade being angularly adjustable with respect to a plane of the rotor about an axis disposed substantially parallel to the floor, the disk being coupled with a shaft having its axis disposed substantially perpendicular to the floor, with an idle spacing element, having a hub coupled rotatably with the rotor, said idle spacing element having an outer diameter greater than the outer diameter of the disk positioned upon the shaft, being free to rotate about the axis of the shaft. 
     
     
       2. A machine as in claim 1, wherein each blade is fixed to the flat bottom face of a respective shaft disposed substantially parallel to the floor, said respective shaft having each end rotatably supported by the disk at an intermediate position on a shorter side of the slots. 
     
     
       3. A machine as in claim 2, wherein the shaft is provided with driving means and with a sliding collar disposed with an annular projection. 
     
     
       4. A float finish machine for floating floors, comprising a rotor including a disk, disposed substantially parallel to the floor, the disk having radial slots each accommodating a trowel blade, each trowel blade being angularly adjustable with respect to a plane of the rotor, each trowel blade being fixed to the flat bottom face of a respective shaft about an axis disposed substantially parallel to the floor, said respective shaft having each end rotatably supported by the disk at an intermediate position on a shorter side of the slots, the disk being coupled with a shaft having its axis disposed substantially perpendicular to the floor, with an idle spacing element having an outer diameter greater than the outer diameter of the disk positioned along the shaft parallel to the floor, said idle spacing element being free to rotate about the axis of the shaft, the shaft is provided with driving means and with a sliding collar disposed with an annular projection, said sliding collar is rotatably coupled with said idle spacing element, said idle spacing element having a hub ensheathed by a sleeve capable of axial movement as one with the sliding collar while rotatable in relation thereto, said sleeve affords an annular projection co-operating with a device for setting the angular position of the trowel blades, said device for setting the angular position of the trowel blades comprises a forked oscillating lever engaging said angular projection, said forked oscillating lever being pivotably connected to one end of a tie rod having a second end pivotably connected to an adjustment screw. 
     
     
       5. A machine as claimed in claim 3, wherein said sliding collar is rotatably coupled with said idle spacing element, said hub of said idle spacing element ensheathed by a sleeve capable of axial movement as one with the sliding collar while rotatable in relation thereto. 
     
     
       6. A machine as in claim 5, wherein said sleeve affords an annular projection co-operating with a device for setting the angular position of the trowel blades. 
     
     
       7. A machine as in claim 6, wherein said device for setting the angular position of the trowel blades comprises a forked oscillating lever engaging said annular projection, said forked oscillating lever being pivotably connected to one end of a tie rod having a second end pivotably connected to an adjustment screw. 
     
     
       8. A machine as in claim 6, wherein the annular projection of said sliding collar engages a plurality of crank levers, each crank lever being keyed to one end of a respective horizontally disposed shaft. 
     
     
       9. A machine as in claim 1, wherein said disk is provided with a flat roughing tool exhibiting a profile matched substantially to that of the disk when viewed in plan, the flat roughing tool disposed with a central cavity. 
     
     
       10. A machine as in claim 9, wherein the flat roughing tool is provided with a set of catch pin elements engaging corresponding slots of the disk. 
     
     
       11. A machine as in claim 10, wherein, with the exception of the slots for engaging the roughing tool, the disc has no apertures between the radial slots. 
     
     
       12. A machine as in claim 10, wherein the catch pin elements are angled rearwardly with respect to the direction of rotation of the disk. 
     
     
       13. A machine as in claim 10, wherein the catch pin elements are substantially cylindrical in shape and are provided with an intermediate portion of reduced diameter. 
     
     
       14. A machine as in claim 13, wherein each slot comprises a first stretch having a width greater than the diameter of intermediate portion of the catch pin element but less than the diameter of the catch pin element, said first stretch being followed in the direction of rotation of the disk by a second stretch having a width greater than the diameter of the catch pin element degree of clearance. 
     
     
       15. A machine as in claim 1, wherein the profile of the single trowel blade, viewed in cross section, appears substantially laminar with an upwardly angled forward edge.